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Group key distribution method for machine-type communication based on proxy re-encryption

A machine type communication and proxy re-encryption technology, applied in the field of communication, can solve the problems of overloaded server and network signaling congestion, and achieve the effect of reducing load, reducing signaling congestion, and improving service quality.

Active Publication Date: 2016-01-20
XIDIAN UNIV
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Problems solved by technology

[0005] The object of the present invention is to propose a machine type communication group key based on proxy re-encryption in view of the problems of heavy server load and network signaling congestion in the prior art when performing machine type communication group key negotiation or distribution distribution method

Method used

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  • Group key distribution method for machine-type communication based on proxy re-encryption
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  • Group key distribution method for machine-type communication based on proxy re-encryption

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Embodiment Construction

[0041] The present invention will be further described below in conjunction with the accompanying drawings.

[0042] refer to figure 1 , the implementation steps of the present invention are as follows:

[0043] Step 1, generate and expose the main parameters.

[0044] In the first step, the key generation center KGC selects a prime number p greater than 160 bits, constructs three groups, and the three groups include the additive group Z modulo the prime number p p , two cyclic groups G with prime number p as factorial method 1 and the multiplicative cyclic group G 2 ; and the multiplicative cyclic group G 1 Mapping to the multiplicative cyclic group G 2 , get the bilinear map e, denoted as e:G 1 ×G 1 →G 2 ;

[0045] Step 2, from the multiplicative cyclic group G 1 Select a generator g arbitrarily in , according to the following formula, the key generation center KGC calculates the elements in the group parameter set:

[0046] u j ...

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Abstract

The invention discloses a group key distribution method for machine-type communication based on proxy re-encryption. The problem of network signaling jam and server overload in the prior art is mainly solved. The distribution method is realized through the following steps: 1, generating a system parameter; 2, generating and distributing public and secret keys; 3, generating a re-encryption key; 4, obtaining a ciphertext; 5, sending a message to a proxy gateway; 6, receiving the message by the proxy gateway; 7, generating and broadcasting a re-encrypted ciphertext; 8, receiving a broadcast message; and 9, decoding the re-encrypted ciphertext to obtain a group key. According to the invention, through proxy re-encryption, the re-encrypted ciphertext is generated and broadcasted by utilization of the proxy gateway, and the problem, of network signaling jam and server overload, generated during key distribution of a machine-type communication server and a machine-type communication equipment group is relieved. The method is applicable to a machine-type communication network.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a method for distributing group keys of machine type communication based on proxy re-encryption in the technical field of machine type communication. In the technical field of machine type communication, the present invention can be used in the scenario where a machine type communication server and a large number of machine type communication devices perform group key distribution, solves network data congestion, reduces the load of the machine type communication server, and realizes an encrypted communication function. Background technique [0002] Machine type communication, as an important means of communication in future mobile communication, has attracted more and more attention. In the Long Term Evolution LTE network, reducing the energy consumption of devices and realizing simultaneous transmission of multiple devices are key issues that MTC needs to solve. Ac...

Claims

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Application Information

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IPC IPC(8): H04L9/08H04L29/06H04W4/00H04W12/04H04W12/0431
Inventor 张跃宇张永钰李晖陈杰党岚君
Owner XIDIAN UNIV
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